Plate-glass-turnover frame



Dec, 16, 1924.

W. OWEN PLATE GLASSl TURNOVER FRAME Filed sept. 11". 1923 Patented Dec. 16, 1924 ll hl 115D' S T VILLAM OWEN, 0F PITTSBURGH, PENNSYLVANIA, A'SSGNOR) T PITTSBURG PLATE GLASS COMlANY, A CORPORATION OCE PENNSYIVANIA.

rLafrE'sLAss-Tcnnovnn FRAME.

Application filed` September 1l, 19.23.

To all whom i may conce/vi.'

Be it known that I, VILLIAM OWEN, a citizen of the United States, and a resident of Pittsburgh, in the county of Adlegheny and State of Pennsylvania,v have made a ne\` and useful invention in Improvements in Plate-(llass-Turnover Frames, of which the following is a specification.

rEhe invention relates toa. turn over frame for handling' plate glass. It has for its principal objects, the provision of an improved device of simple construction, by means of which, sheets of glass may be l-iitted` and turned over, or shifted between horizontal and vertical positions,- with safety, and

which may be easily applied to and released from the glass sheets. The device is particularly designed for use in connect-ion with plate glass formed in a continuousribbonand cut into sheets, which sheets are` then placed upon tables and carried beneath a series of grinding and polishing machines. After.' a. glass sheet has been surfaced on one side, it is necessary to lift it from the table,I and turn it upside down for application to another table, preliminary to surfacing; the second side of the sheet, and the apparatus is speciallyT designed to carry out this shifting operation, although useful in any relation in which it 'is necessary to reverse in position a sheet of glass which is too large to reverse with ease or safety by hand. One embodiment of the invention is illustrated in the accompanying drawings wherein:

Figure 1 is a front elevation of the device in position of use. Fig. 2 is a section on the line 11--11 of F ig. 1, And Figs. 3 and 4 are sections on the lines 111-111 and lV-IV of Fig. 2.

Referring to the drawings, 1 is a transverse pipe having its ends: split and flattened and fitting over the upright plates, 2, 2 to which such ends are riveted as indicated at 3. Extending downwardly beneath the plates 2, 2 are the side members 4, 4. rFliese members are secured to the plates 3, 3 by means of the pairs of links 5, 5 and 6, 6. This arrangement provides for a parallel movement of approach between the members i, 4.

The lower ends of the members 4, 4 are bent into the eyes 7, 7 for receiving the Shanks 7, 7 a of'the bracket 8, 8. Washers 9, 9 are provided adjacent the ends of the Shanks and one end of each shank is thread- Serial No. 662,160.

ed to receive the holdingy nut 10. The brackets 8 are grooved to receive the plates 11, shown in cross section in Fig. 3. The platesll are' preferably of a length substantially equal to the sheet of glass 12, which is to be turned. over. The plates 11 are slottedv as indicated at 13 to provide the ta'- pering openings for readily receiving the edges of the glass sheet, the bottoms of the slotscarrying the pads 14, preferably of rnbber, for cushioning the glass.V The plates 11 are preferably secured in the brackets 8 by meansof boltsor rivets.

The deviceis carriedfroin above by a suitable crane (not shown) a two point support on the' chains 15, 15 being preferably provided, although, if desired, the device mayv be supported from the single central member 16 extending, through the pipe 1 and provided with the nuts 17.

In order that the device may be. conveniently opened, the togglel leversI 2O are pio vided, such` levers being pivoted to the side members 4, 4 at their outer ends, and pivoted together at their inner ends, as indicated at 21. The levers are operated by a. cable passing over the pulley 23 which supported by the eye bolt 24 upon'. the pipe 1. Various other arrangements of elements for separating the members 4,4, might be substituted for the one shown.

In operation, in order to lift the sheet of glass 12 from the table 18, the device is lowered by the cranes so that the slotted plates 11, 11 `are opposite the edges of the sheet, after which, each edge of the sheet is lifted manually to a sufficient extent to slide the slotted plates in over such edges. The crane is then operated to lift the device, the side members tending to move inward and grip the sheet due to the fact that these members lie outside the vertical planes of the pivotal connections between the links 5 land 6 and the plates 2, 2. The extent of the inward pressure exerted may be mo'diiied by making use of the plurality of pivot holes 19 in the lower ends of the links. The nearer the links approach the horizontal when the slotted plates 11, 11 engage the edges of the glass sheet, the greater will be the pressure exerted by such plates upon the sheet. This pressure insures against slipping during the reversing operation as the plate approaches a vertical plane. After the glass plate is engaged llt) by the device, as indicated in Fig. l, the crane is operated to lift the device to give clearance for turning above the table, or the device is carried to one side of the table before turning, in which case, the heightto which the device must be raised before the turning operations is reduced. After the necessary clearance is provided for, the plate is turned about the Shanks 7, 7a to bring the rough side of the plate uppermost, after which it is again placed upon the table, the frame being lowered, so that the side member 4, 4 may be pulled outward to release the edges of the sheet. If desired the device may also be used to stack the plates in upright racks or to remove the sheets from such racks and place them upon the surfacing tables or upon cutting tables. The devine thus has a field or' use aside from the one involving the reversing of the sheets. lThe device is designed to handle a sheet or pla-te of glass which is about twice as long as wide, and as the plates ll, which extend longitudinally of the glass are relatively flexible, the glass and the plates 1l bend slightly lengtlr wise of the glass, which lengthwise bending stiifens the glass lagainst bending transversely of the sheet between the plates ll, 1l, so that the danger of breakage is reduced. The apparatus may `also be adapted for lifting and handling articles other than glass plates, all that is required for adapting the device for such purposes being a modiiication of the members ll to fit them for engaging the particular article which is to be handled.

l/Vhat I claimf is:

1. In combination in yglass turn-over apparatus, a transverse frame, a pair of vertical side members, one of which is mounted for parallel movement toward and from the other member on said frame, and a glass engaging member at the lower en'd of each side member, said engaging members being swiveled to said side members and being slotted to receive the edges of the glass sheet.

2. In combination in glass turn-over apparatus, a transverse Jframe, a pair of vertical side members, mounted for parallel movement toward and from each other on said frame, and a glass engaging member at the lower end of each side member, said engaging members being swiveled to said side members and being slotted to receive the edges of the glass sheet.

3. In combination in glass turn-over apparatus, a transverse fra-me, a pair of vertical side members, a pair of parallel links pivotally connecting the upper end of each of said side members with the end of said frame, and a glass engaging member at the lower end of each side member, said engaging members being swiveled to said side members and being slotted to receive the edges of the glass sheet.

a. In combination in turn-over apparatus, a central frame, a pair of vertical side members, a pair of parallel links pivotally connected to each of said side members at their outer ends, and to said central frame at their inner ends, and a pair of opposing members for engaging the article to be turned over swiveled on horizontal axes at the lower ends of said side members.

In testimony whereof, I have hereunto subscribed my name this 18th day of Aug.,

WILLIAM OWEN. 

